INDEX. 



437 



Motion (continued). 



an affection of matter, 1S6. 



vast effects of; 217. 

 Mountain tops, heat of, 282. 



Nebular hypothesis, 230. 

 Nerve-power, source of, 430. 

 New views, public acceptance of, 9. 

 New doctrine of forces, how far accepted, 



xiv. 



Newton, xiii., xviii., 241, 276, 282, 368, 378. 

 speculations on light, 137. 

 Niepce de St. Victor, M., 125. 

 Numbers the highest aim of investigation, 



Oersted s discoveries, 5. 

 Optic axis of crystals, 171. 

 Organic beings, source of their motions, 

 237. 



kingdoms of nature, relations to each 



other, 433. 



co-ordination, 410. 



correlations, Grove on, 172. 

 Organization, distinction between high and 



low grades of, 408. 

 Origin of the sun s heat, 276. 

 Origin of terrestrial power, 236, 340. 



Page, Mr., 151. 



Particles, in what sense the term is used 



by Grove, 39. 

 Pasteur, M., 132. 

 Peltier, M., 96. 

 Perpetual motion, 191, 192, 212, 219, 221, 



Persistence of force, xxxix. 

 Photography, chemistry of, 111. 

 Physical science of the present distin 

 guished from that of the past, 402. 

 Planetary atmospheres, 137. 



motions, 267. 



system, structure of, 230. 

 Planets, temperatures of, 121. 

 Piants, chemistry of, 420. 

 Plenum, a universal, 134. 

 Pliicker, 171. 



Plurality of worlds, 122. 



Poisson, M., 81. 



Pouillet, M., 244, 264, 280. 



Powell, Baden, on Newton s rings, 41. 



Practical arts after the middle ages, 211. 



Ptolemaic system, 11. 



Q 



Qualities of matter, transference of, 15. 



Rankine, Mr., xxviii. 

 Eegnault, M., 225. 



Eespiration in cold-blooded animals, 429. 



Eoget, Dr., 4. 



Eotation of the earth, diminution of the, 



299. 



Eoyal Institution, foundation of the, xxx. 

 Eule for the investigation of nature, 816, 



318. 

 Eumford, Count, 4. 



summary of his claims, xv. 



sketch of, xvii. 



researches of, xx., 347. 



Seebeck, Dr., 118. 

 Seguin, M., 4, 76. 

 Sensations of heat disturb the judgment, 



Sensations, misleading, 174. 

 Science, tendency of, toward immaterial- 

 ism, xii. 



the great event in the general progress 



of, xvi. 



the true scope of, xxxi. 



discovery of its fundamental principle, 



816. 



Simultaneous discovery, examples of, xv. 

 Social forces, correlation of, xxxvi. 

 Solar radiation, effects of, 236. 

 origin of organic power, 240. 



heat, amount of, 248, 264. 



spots, 286. 



atmosphere, 288. 



radiation, dynamical effecte of, 403,404. 

 Sondhauss, Mr., 126. 



Sound and light, 259. 



Specific heat, dynamic view of, 53. 



Spectrum, analysis of, 62. 



Spencer, Herbert, on the persistence of 



force, xxxix. 



Steam engine, action of, 220. 

 Stephenson, George, 115. 

 Stewart, Balfour, 61. 

 Store of force in the universe, 232. 

 in the planetary system at present, 



Structure of bodies as affecting heat- 

 motion, 55. 

 Sun, cooling of, 265. 



Talbot, Mr., 112. 

 Tension, a static force, 22. 

 Theories, immature, 110. 



new, now they are to be judged, 196. 



the test of, 276. 

 Theorizing, what is it ? 198. 

 Thermography, 58. 



Thilorier s experiment on carbonic acid, 48. 

 Thompson, Prof., 52, 227, 229. 

 Tidal wave, 241, 291. 



Time as an element of dynamic changesi 

 360. 



an element in the sequence of phe 



nomena, 17. 



necessity of its early measurement, 820. 



